CN203722328U

CN203722328U - Apparatus capable of automatically switch power frequency electric supply in case of UPS own faults

Info

Publication number: CN203722328U
Application number: CN201420001461.6U
Authority: CN
Inventors: 路俊贵
Original assignee: Shanxi Taigang Stainless Steel Co Ltd
Current assignee: Shanxi Taigang Stainless Steel Co Ltd
Priority date: 2014-01-02
Filing date: 2014-01-02
Publication date: 2014-07-16
Anticipated expiration: 2024-01-02

Abstract

Provided is an apparatus capable of automatically switch power frequency electric supply in case of UPS own faults, belonging to the electrical field. The apparatus is composed of a UPS loop, a UPS indication loop and a power frequency electric supply loop. In the UPS loop, the upper end of a duplex air switch QA1 is in connection with power supplies L1 and N, and the lower end is in connection with a UPS; the UPS provides two loop output, wherein one loop is in connection with the coil of a contactor, and the other loop is in connection with one end of two normally open contacts of the contactor; the other end of the two normally open contacts is connected to an electric power apparatus. In the power frequency electric supply loop, the upper end of a duplex air switch QA2 is in connection with the power supplies L1 and N, and the lower end is in connection with two normally closed contacts of a contactor KM; the two normally closed contacts are in parallel connection with the UPS loop and are then in connection with the electric power apparatus. The apparatus realizes double loop automatic power supply switching for the electric power apparatus through electronic components and effectively solves power outage caused by UPS own faults.

Description

Automatically switching power frequency city electric installation during the fault of a kind of ups power own

Technical field

The utility model belongs to electric field, automatically switching power frequency city electric installation while being specifically related to the fault of a kind of ups power own.

Background technology

UPS uninterrupted power supply, Main Function is prevent unexpected power-off and affect normal work, to computerized equipment, causes damage.When exchanging dead electricity, the exportable alternating current of UPS in the short time, takes emergency first-aid repair measure for personnel, and the infringement that has a power failure is reduced to minimum.UPS is mainly comprised of several parts such as rectifier, storage battery, inverter and static switches.Therefore UPS uninterrupted power supply has very important effect, in the local extensive application such as steel mill's milling train dispatch control system, step-down station background monitoring system.

After UPS long-time running due to the inner reason of battery failure or itself; usually cause the unexpected power-off of UPS, cause computerized control system to shut down because of power-off, operating equipment quits work; have a strong impact on production, even blast, cause the serious accident of device damage, casualties.

In the unexpected power-off of the UPS of steel mill, cause control PLC module dead electricity as automatic in VD vacuum furnace, computer main control system dead electricity interruption of work, the equipment that computer is controlled cannot normal running, operation or operating personnel can only implement manual-operated emergent measure, because liquid molten steel in ladle can not be had bad luck and hang away in time, the lighter's low temperature returns steel and heavily refines, increase production cost energy resource consumption and formed waste, severe one steel ladle is subject to high temperature erosion overlong time, easily form the bleed-out accident of running, the water-cooled part accident such as easily blast of breaking, badly damaged equipment threatens field personnel's personal safety.

Summary of the invention

For fear of above-mentioned accident occurs, the device of automatically switching power frequency civil power when the utility model provides the fault of a kind of ups power own, when operating UPS cut work, can automatically switch to power frequency civil power, can not cause power failure, do not need personnel to operate, for the repair and maintenance of UPS tries to gain time precious to one, preferably resolve the power outage causing because of the fault of UPS own.

The utility model comprises contactor, air switch, indicator light, and air switch one end connects power frequency mains supply, and the other end of air switch connects contactor, and the normally-closed contact of contactor is connected on the circuit that UPS is connected with power consumption equipment.

The utility model can guarantee when UPS fault, still can output voltage, guarantee the safety utilization of electric power of equipment, and effectively avoided the potential safety hazard or the contingent accident that because of the unexpected dead electricity of UPS, cause.

The present invention has improved continued power rate, has guaranteed the safety utilization of electric power of equipment, has effectively avoided all kinds of accidents that occur because of unexpected power failure, without personnel, intervenes, and simple, intuitive, has greatly reduced power down loss, guarantees the safety of the person, equipment.

The utility model utilizes electronic component to realize the power supply of automatically switching to power consumption equipment double loop; The utility model efficiently solves the power outage causing because of the fault of UPS own.

Accompanying drawing explanation

Fig. 1 is the circuit diagram of the utility model embodiment.

In figure: QA1, QA2, QA3 are respectively each loop automatic air-break switch, and KM-contactor (model is: 3TF42), and HL-ups power relay indicating light.1,2-be respectively the output of ups power two-way.

Embodiment

The present embodiment is comprised of ups power loop, ups power indication loop, power frequency civil power loop,

Ups power loop forms---by duplex air switch QA1 upper end, connect power supply L1, N, lower end connects ups power, ups power self provides two loop outputs, wherein a loop connects the coil of contactor, another loop connects two normally open contact one end of contactor, and two normally open contact other ends are connected on power equipment.

Ups power indication loop forms---first by power firestreak L3, pass through duplex air switch QA3 one end, the auxiliary normally open contact of series contactor KM, then the signal lamp HL that connects, get back to the duplex air switch QA3 other end, turn back to zero line N, complete loop.

Power frequency civil power loop forms---and by duplex air switch QA2 upper end, connect power supply L1, N, lower end connects two normally closed interlocks of contactor KM, after being connected in parallel, is connected to power equipment with ups power loop.

Power frequency mains supply has adopted three-phase four-wire power supply, the QA1 that closes a switch first respectively, QA2, QA3, and the course of work is as follows:

1, ups power starts to power on and normally works, its ups power can provide and in multichannel output AC AC220V(figure, select wherein two-way output of picture), 1 tunnel output directly connects the coil of contactor KM, KM coil obtains electric adhesive, its contactor KM often opens main contact closure, 2 road ups power outputs provide electric power by the closed conducting of contactor normally opened contact to power equipment, another normally open contact of contactor KM is closed, ups power work indication loop conducting, indicator light is lighted simultaneously, now, contactor KM disconnects another simultaneously to normally closed interlock, power frequency civil power loop is cut off rapidly, power equipment is worked under ups power power supply state.

2, when ups power is because of internal fault, when output exchanges output without AC220V, contactor KM coil losing electricity, contactor KM normally open contact is opened, disconnected ups power output loop, the closed conducting of contactor KM normally closed interlock simultaneously, by power frequency civil power 220V alternating current access power equipment, guarantees the normal power supply of power equipment.Now, in ups power indication loop, normally open contact is also opened, and indicator light extinguishes, and reminds operation, attendant's ups power fault need be paid close attention to or overhauls in time processing, has an accident like this with regard to having avoided because the fault of UPS own causes power equipment power failure.

Claims

1. the automatically switching power frequency city electric installation during fault of ups power own, is characterized in that being comprised of ups power loop, ups power indication loop, power frequency civil power loop;

Described ups power loop, by duplex air switch QA1 upper end, connect power supply L1, N, lower end connects ups power, ups power self provides two loop outputs, wherein a loop connects the coil of contactor, another loop connects two normally open contact one end of contactor, and two normally open contact other ends are connected on power equipment;

Described ups power indication loop, first passes through duplex air switch QA3 one end by power firestreak L3, and the auxiliary normally open contact of series contactor KM, then the signal lamp HL that connects, get back to the duplex air switch QA3 other end, turns back to zero line N complete loop;

Described power frequency civil power loop, connects power supply L1, N by duplex air switch QA2 upper end, and lower end connects two normally closed interlocks of contactor KM, after being connected in parallel, is connected to power equipment with ups power loop.